ES2266657T3 - RELAY WITH NUCLEO OF CROSS SECTION AGRANDADA. - Google Patents

Abstract

A partition plane (26) extends between first (19) and second (20) core elements in a coil's lengthwise direction (L) parallel to a yoke (3). Interlayered surfaces are made as flat and smooth as possible on the parting plane as well as on a buffer surface (27) between a cross-sectional enlargement (22) and the yoke. This avoids air gaps in transitional areas and losses in magnetic flux.

Description

Relay with cross section core enlarged

The invention relates to a relay with a reel of the coil, a core that passes through the spool of the coil and a yoke, the surface of the core cross section being in the zone of the transition to the yoke and on the front side of the core that as such a front side is facing away from the yoke greater than in the area core core that is surrounded by the reel of the coil.

For example by documents EP-A-202 651, EP-B-363 976, EP-B-691 667 and DE-C-42 32 228 are known relays They have these characteristics.

In the document US-A-3,497,845 is described another relay comprising a spool of the coil, a core arranged in the reel of the coil and a yoke.

In WO-A-00 24019 a safety valve having an element is described in U that constitutes the yoke with the nucleus and presents an arm that it constitutes the nucleus and an arm that constitutes the yoke, being the arm constituting the core disposed in a reel of the coil.

In all these relays, the reel of the coil, the nucleus and the yoke form a magnetic system that when taking place coil excitation causes switching. During the switching, when the coil is excited a force is produced Magnetic switching that causes armor to move. He armor movement is transmitted to a contact spring which immediately closes or opens contacts.

In relays that are known according to the state of the technique constitute a disadvantage in part only small switching forces, or large sizes of shapes constructive when switching forces are large.

The invention therefore pursues the purpose of improving a relay of the class mentioned at the beginning of so that with a small constructive volume large ones are achieved switching forces

This purpose is achieved for the relay that has been mentioned at the beginning thanks to the fact that the core is formed by at least two core elements.

This solution is constructively simple and leads to the obtaining of less constructive forms of the relay in which at the same time keeps a great force of commutation.

According to the preamble of the first claim, the central area of the core, which is surrounded by the reel of the coil, has a reduced cross section that provides space for additional windings of the coil, whereby the coil It can produce greater magnetic force. In the transition zone between the yoke and the core and on the front side of the core that as such front side is with its back to the yoke the cross section on the contrary it is enlarged, with which a greater magnetic flux from the core to the yoke. Both measures that they adopt, that is the enlargement of the cross section in the area of transition between the nucleus and the yoke as well as the reduction of cross section and the increase in available space for the winding on the reel of the coil, they complement each other optimally to produce a greater switching force.

The core is according to the invention formed by the minus two core elements.

Relay performance improved in such a way It can be increased by different improvements advantageous and independent of each other that are clarified to continuation.

In case for example the front side of the core that as such front side is facing away from the yoke form a polar surface that cooperates with a mobile armor, according to a advantageous improvement of the invention the surface area polar may be according to the invention greater than the surface of the cross section in the central area of the core. Thanks to the increased polar surface acts on the armor a greater flow magnetic, which guarantees the obtaining of great forces of switching and performing fast switching.

In an improvement the core can be also configured so that it has dimensions reduced in the reel area of the coil, which in both core ends are available large sectional surfaces cross section for magnetic flux conduction with low losses, and at the same time in the area of reduced dimensions has space for additional turns of the supported coil by the reel of the coil.

The assembly of the core in the reel of the coil It can be simplified through a series of improvements that They are independent of each other.

The core elements can be configured in such a way that they can be introduced consecutively on the reel of the coil, which in spite of the enlarged cross section is possible a simple assembly, although the enlargement of the cross section of the Core subsequently snaps with the spool of the coil.

At least two core elements can present an enlarged cross section towards the yoke; and they can also present an enlarged cross section towards the polar surface at least two core elements.

To facilitate the assembly of the core in the reel of the coil despite the enlargement of the section transverse, a core element may be configured so that in essence it can be made to enter the reel of the coil. He core element may be particularly configured so that can be made to enter the reel of the coil when it is already introduced the other element of the reel into the reel nucleus.

The assembly of the core element can be also facilitated by the fact that at least one element of the core is essentially configured without beading, that is with a essentially parallelepipedic form. This configuration facilitates in particular the introduction of the core element in the reel of the coil

The core can also consist of a plurality of core elements arranged next to each other transversely with respect to the longitudinal extension of the reel of the coil, being minimized thanks to it the loss powers when the power is connected and / or disconnected coil excitation. In this configuration the elements of core may have been previously assembled having thus been solidly united to each other.

The core or at least one core element it can also be configured so that it forms a single piece with the yoke, so that they remain at the lowest possible level losses when the passage of the magnetic flux from the core to the yoke and to reduce the complication of assembly work.

To be able to unite with maximum efficiency as integral module in the assembly the spool of the coil and the yoke, in the case of a yoke that is configured so that it forms a single piece with at least one core element this element of the core can be configured so that it can be entered into The reel of the coil. By adopting this measure the modular assembly formed by the reel of the coil and the yoke is performed by simply introducing the yoke into the reel of the coil. Only the core element that is provided with Enlargement of the cross section should be introduced in the reel of the coil before the introduction of the element of the core that is provided in the yoke.

To minimize losses that occur when take place the passage of the magnetic flux from the core to the yoke, at least an element of the core may be at least in contact with the yoke, with what does not exist or are as small as possible air gaps that must be crossed by the magnetic field.

The invention is clarified below on the basis of different embodiments and by way of example doing Reference to the attached drawings. The different characteristics that they occur in the different embodiments can also be combined independently of each other, as already stated before exposing the different settings advantageous

The different figures show the following:

Fig. 1, an embodiment of a relay in a schematic perspective view;

Fig. 2, an embodiment of a coil spool with core and yoke in a schematic view in perspective;

Fig. 3, the core and the yoke of the shape of embodiment of Fig. 2 in a schematic view in perspective;

Fig. 4, an embodiment of a core element in a schematic perspective view;

Fig. 5, another embodiment of a core element in a schematic perspective view;

Fig. 6, another embodiment of a core element in a schematic perspective view;

Fig. 7, an embodiment of a reel of the coil in a schematic perspective view;

Fig. 8, the spool of the coil of Fig. 7 in a view according to arrow VIII; Y

Fig. 9, an embodiment of a coil reel with core element inserted in a schematic perspective view.

The form is first described General construction of a relay referring to Fig. 1.

A relay 1 has a coil (not shown in Fig. 1) which is wound on a reel 2 of the coil, a yoke 3 and a core (not shown in Fig. 1) that crosses the Reel 2 of the coil. Yoke 3 ends on a polar surface 4 that adjoins a working air gap 5. In other configurations the polar surface 4 may also be configured in the nucleus.

The working air gap 5 is arranged between the polar surface 4 and a mobile armor 6. Through a connecting element 7 that is guided along the spool 2 of the coil the armature 6 is attached to a contact spring 8 so such that a transmission of said movement takes place armor, whereby a movement of armor 6 necessarily gives place to a movement of the contact spring 8.

The contact spring 8 is in turn arranged between two contacts 9, 10 that are spaced apart from each other in the direction of movement of the contact spring, being able to say contact spring preferably establish contact in each case with only one of both contacts 9, 10. The contact spring 8 is usually subject to preload so that in the absence of current is applied against one of the contacts, and by example against contact 10.

When the current is passed through the coil excitation, a magnetic force is produced on the polar surface 4 which attracts armor 6 and tends to reduce the air gap of job. Because of this, armor 6 moves by abandoning its resting position Through the connecting element 7 this movement it is transmitted to the contact spring 8. Because of this, the spring of contact 8 also moves leaving its resting position, and is pressed against contact 9.

The contacts 9, 10, as well as the spring of contact 8, are respectively provided with contact pins 11, 12, 13 that are directed towards the outside of the relay. The contact pins 11, 12, 13 can be respectively provided in pairs.

Contacts 11, 13 or 11, 12 are closed at depending on the position of the contact spring 8. For example in the resting position of the contact spring 8 which is shown in Fig. 1, contacts 11 are connected to each other and 12 through contact spring 8 and contact 11.

To achieve contact points defined in the contacts 9, 10 and on the contact spring 8, may be provided contact buttons 14, 15, 16 on contacts 9, 10 and / or on the contact spring 8.

In Fig. 2 a form of realization of the spool 2 of the coil with the yoke 3 and the core 17 running through the coil, looking in the direction of the gaze obliquely to the polar surface 4.

For clarity of the overall vision, it has omitted the coil, which is supported by the spool 2 of the coil in the hollow 18 that runs in the periphery.

As can be seen in Fig. 2, core 17 it presents two elements 19, 20 of the nucleus that remain vertically superimposed on each other transversely with respect to the direction in which the coil runs.

Core 17 protrudes from reel 2 of the coil in the longitudinal direction of spool 2 of the coil.

In Fig. 3 the yoke and the core 17 in the perspective of Fig. 2 and with spool 2 of the coil removed.

It can be seen that a core element 20 it is configured in such a way that it forms a single piece with the yoke 3, while the other element 19 of the core is applied to the yoke 3 and to core 20. In the direction of the armor, on the surface front 21 of the core 17 both elements 19, 20 of the core, so as to form a front surface 21 which is essentially flat and can also serve as a polar surface 4.

One of the elements 19, 20 of the core, and specifically in the embodiment of Fig. 3 element 20 of the kernel that is configured so that it forms a single piece with the yoke, is essentially parallelepipedic and does not present outgoing and / or undercut.

The other independent element 19 of the core is in the longitudinal direction L of the coil provided with enlargements 22, 23 of the cross section in the respective extreme surfaces The enlargements 22, 23 of the section transverse fit later with spool 2 of the coil.

In the central zone of core 17, which is surrounded by the spool 2 of the coil, the cross section of the core is reduced with respect to both extreme areas located in the longitudinal direction of the reel of the coil. With that remains formed a gap 25 that can be used as additional space winding for the coil, whereby the coil has a higher number and / or density of turns.

In case the core 17 does not border the working air gap 5 of relay 1, you can also give up the Enlargement 23 of the cross section although it is damaged due to this the flow of the magnetic field in its passage from the nucleus to the armor; and naturally also the polar surface 4 formed by yoke 3 you can submit an enlarged section cross.

As can also be seen in Fig. 3, the plane of separation 26 between both elements 19, 20 of the core extends in the longitudinal direction L of the coil parallel to the yoke 3. In the separation plane 26, as well as on the contact surface 27 butt between the enlargement 22 of the cross section and the yoke 3 the surfaces that are applied to each other are configured in such a way that they are as flat and smooth as possible. Thanks to this, air gaps in transition zones are avoided and losses of magnetic flux.

In Figs. 4 to 6 are represented additional embodiments of the core element 20. In all these elements 20 of the core section is enlarged transverse at both ends 22, 23 located in the direction longitudinal in a plane of cross section that extends perpendicular to the longitudinal direction L of the coil.

The cross section plane Q is drawn schematically in Fig. 4 once in the central area as a plane of cross section Q_ {1} and once in the extreme zone as cross section plane Q_ {2}. As you can see, the area of the cross section Q_ {2} is greater than the area of the section transverse Q_ {1}.

Element 19 of the core of Fig. 4 is rationally made in one piece and features angled ends 22, 23. Thanks to a notch 28 that runs the entire width of the core element 19 in the vicinity of rounding 29 of the elbow bending is facilitated.

An element 19 is shown in Fig. 5 of the nucleus that is made up of several individual elements 19a, 19b, ... which are arranged next to each other. Can be any number of elements 19a, 19b, ... of the core arranged next to each other and preferably in contact between yes, having been drawn in Fig. 5 by way of example only Four elements arranged next to each other. They are the same surfaces of the sections, that is the contours, of the different individual elements 19a, 19b, ... of the nucleus in a plane located in the longitudinal direction L. To be able to manipulate so simple element 19 of the core in the embodiment of the Fig. 5, the elements 19a, 19b, ... of the core are mutually united thus forming a monolithic set, having been said joint obtained for example by adhesive bonding, indirect welding or welding.

In the embodiment of Fig. 6 it is treated of a stamped piece of metal in which both enlargements 22, 23 of the cross section are configured in the form of ramps prints that run obliquely in the longitudinal direction L of the coil. Alternatively, the core element 19 may be also manufactured by injection molding.

In Fig. 7 the reel 2 of the coil, the core 17 and the yoke having been omitted 3. The reel 2 of the coil has a step 30 that runs in the longitudinal direction L of the coil and is open in both sides.

In the central area 31 of reel 2 of the coil, which essentially coincides with the hole 18 for the coil, is reduced the cross section of the interior in a plane perpendicular to the longitudinal direction L of step 30, to leave site for additional windings of the coil. Towards both of us of the spool 2 of the reel step 30 is enlarged in a zone 32. The shape of zone 32 is further adapted to the shape of the respective enlargement 22, 23 of the cross section, whereby the core element 19 may be contained with the enlargements 22, 23 of the cross section in step 30. At the point in the which is smaller, the cross section of step 30 is sized so that it can still be entered through the step 30 the enlargement 22 of the cross section of the element 19 of the core. When said core element is introduced, the enlargements 22, 23 of the cross section fit later with spool 2 of the coil, whereby the core element 19 is retained by the reel of the coil of so that in essence it cannot move.

As seen in Fig. 8, in which you can the reel 2 of the coil of Fig. 7 seen in the direction of arrow VIII, the enlargement of the section cross section of step 30 may be configured differently at both open ends, for example to allow in a end the core is flush with reel 2 of the coil and in the other end protrudes core 17.

Step 30 is configured so that when be introduced element 19 of the core with the enlargements 22 and 23 of the cross section is a free space 33 that crosses reel 2 of the coil and has a width practically constant inside. After the introduction of the other respective element 19 of the core can be made to enter the free space 33 the other element 20 of the core. Being held by the enlargements 22, 23 of the cross section, the core element 19 can no longer be removed from step 30 while the other element 20 of the core is inserted. By a lace under pressure of the core element 20, the core may remain firmly retained in the reel of the coil. To do this, the cross section of the core element 20 is somewhat larger than the cross section of free space 33.

The process is briefly described below. for mounting a relay according to the invention.

First the element is introduced into the relay 19 of the core, which is provided with at least one enlargement 22, 23 of the cross section. As for the enlargements 22, 23 of the cross section are embedded in their corresponding Enlargement 32 of the step, is made to enter space 33 which the other element 20 of the core remains.

According to the enlargements 22, 23 of the cross section are monolithically configured in yoke 3 or in the independent element 19 of the core, it is introduced firstly in step 30 the yoke 3 or the core element 19. TO then the core element 20 is introduced which as such element presents an essentially parallelepipedic form.

Claims (11)

1. Relay (1) with a spool (2) of the coil, a core (17) that crosses the spool (2) of the coil and a yoke (3), being the surface (Q_ {2}) of the section transverse of the core (17) in the zone of the transition to the yoke (3) and on the front side of the core (17) which as such front side is facing away from the yoke (3) greater than in the central area (31) of the core (17) that as such a central area is surrounded by the spool (2) of the coil; characterized by the fact that the core (17) is formed by at least two elements (19, 20; 19a, 19b, ...) of the core. 2. Relay (1) according to claim 1, characterized in that the core (17) is configured with reduced dimensions in the reel area (2) of the coil. 3. Relay (1) according to claim 1 or 2, characterized in that an element (20) of the core is essentially configured so that it can be introduced into the spool (2) of the coil. 4. Relay (1) according to one of the preceding claims, characterized in that an element (20) of the core is configured in such a way that it is essentially free of undercuts. 5. Relay (1) according to one of the preceding claims, characterized in that the yoke (3) is configured such that it forms a single piece with one of the core elements (19, 20). 6. Relay (1) according to one of the preceding claims, characterized in that the element (19, 20) of the core which is provided in the yoke (3) forming a single piece thereof is essentially shaped parallelepipedic 7. Relay (1) according to one of the preceding claims, characterized in that the element (19, 20) of the core which is provided in the yoke (3) forming a single piece with it is configured such that it can be introduced when the other element (19, 20) of the core is already inserted in the spool (2) of the coil. Relay (1) according to one of the preceding claims, characterized in that at least two elements (19, 20; 19a, 19b, ...) of the core whose cross section (Q2) is provided are provided. configured in such a way that it enlarges towards the yoke (3). 9. Relay (1) according to one of the preceding claims, characterized in that at least two elements (19, 20; 19a, 19b, ...) are provided of the core whose cross section (Q_ {2}) is configured in such a way that it enlarges towards the polar surface (4). 10. Relay (1) according to one of the preceding claims, characterized in that the core element (19, 20), which is at least one, is in contact with the yoke (3). 11. Relay (1) according to one of the preceding claims, characterized in that the enlargement (22, 23) of the core cross section (17), which as such an enlargement is at least one, subsequently fits the reel (2) of the coil.